. >>> a former navy s.e.a.l. who was known for his record-setting sniper skills has been shot to death. chris kyle was one of two men killed at a gun range in texas. he served four combat tours in iraq and wrote a best-selling book about his experiences as a sniper after he left the navy in 2009. police arrested a suspect in kyle's death and the second shooting victim, chad littlefield. those are your headlines. "reliable sources" at the top of the hour, but now back to "fareed zakaria gps." >>> only one person in the world who has won a nobel prize, an oscar, a grammy and an emmy. he's not an actor or a singer, he is an environmental activist, a writer, a very successful businessman and he happens to be the former vice president of the united states. i am, of course, speaking of al gore. he has a fascinating new book out called "the future six drivers of global change." welcome back. >> thank you. good to be back. >> now, we could talk about everything and we will talk about the book, which is fascinating. but s